Sleeping bag with air pockets

ABSTRACT

A sleeping bag includes a shell defining an enclosed heat insulation space, a sleeping bag filler filling the heat insulation space, and air bags that are provided inside the heat insulation space. The heat insulation space includes a bottom portion and a non-bottom portion. The bottom portion is adapted to support the weight of a user of the sleeping bag. The air bags are positioned in the bottom portion. The air bag includes an elongated air tube, an air communication conduit, and an air plug. The air bags are spaced from one another by a predetermined interval. The sleeping bag filler fills the heat insulation space between the air bags. The air bag may further include an air bag filler that is provided inside the air tube. The air bags may be connected to form a single sealed air space.

BACKGROUND OF THE INVENTION

The invention relates to a sleeping bag. More particularly, theinvention is related to a sleeping bag that includes air pockets inorder to maximize heat insulation effects.

A sleeping bag is mainly used for situations where there are little orno heating. Essential requirements for a sleeping bag are that it shouldretain heat and provide thermal insulation, and should still be lightand small for easy packing and transportation.

Sleeping bags by prior art include a fabric shell filled with syntheticfibers or down. One disadvantage of sleeping bags by prior art is thattheir insulation property is not uniform but differs along thedirection. Heat insulation property of a sleeping bag is provided mainlyby air contained in gaps between the synthetic fibers or down feathers.The gaps are reduced in the bottom portion of the sleeping bag since thebottom portion is compressed by the weight of a user and becomes thin.For this reason, a sleeping pad is usually used to provide extrainsulation between a user and the ground on which the user lies.

The insulation property is more important in the bottom portion of asleeping bag since heat loss may occur mostly through heat transferbetween the bottom portion of the sleeping bag and the ground.

Therefore, there has been a need for a sleeping bag, which has uniforminsulation property in all directions, and even strengthened insulationproperty for the bottom portion.

SUMMARY OF THE INVENTION

The present invention contrives to solve the disadvantages of the priorart.

An objective of the invention is to provide a sleeping bag that hasuniform thermal insulation property in all directions.

Another objective of the invention is to provide a sleeping bag that hasstrengthened thermal insulation property in a bottom portion thereof.

In order to achieve the above objectives, the present invention providesa sleeping bag that includes a shell defining an enclosed heatinsulation space, a sleeping bag filler that is provided inside the heatinsulation space, and one or more air bags that are provided inside theheat insulation space.

Each of the air bags includes a sealed air space that contains air.

The heat insulation space includes a bottom portion and a non-bottomportion. The bottom portion is adapted to support the weight of a userof the sleeping bag. The air bags are positioned in the bottom portion.

Each of the air bags includes an elongated air tube.

The sleeping bag may include a pump that inflates the air bags.

Each of the air bags includes an air communication conduit, and an airplug that plugs the air communication conduit.

The air bags are spaced from one another by a predetermined interval.The sleeping bag filler fills the heat insulation space between the airbags.

The sleeping bag filler is made of synthetic fiber, down, cotton orwool.

In another aspect of the invention, each of the air bags furtherincludes an air bag filler that is provide in the sealed air space. Theair bag filler is made of synthetic fiber, down, cotton or wool.

In still another aspect of the invention, the air bags are connectedwith one another so that the air bags forms a single sealed air spacethat contains air.

The advantages of the present invention are: (1) the sleeping bag hasexcellent heat insulation property in the bottom portion since thebottom portion is not compressed by the weight of a user; (2) the seriesof air bags structurally support the weight of a user, and therefore thefiller material does not collapse and keep its insulation propertythereby keeping the user warm; (3) the air bags pre-filled with thefiller provides more warmth; and (4) a separate sleeping pad is notnecessary.

Although the present invention is briefly summarized, the fullerunderstanding of the invention can be obtained by the followingdrawings, detailed description and appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects and advantages of the presentinvention will become better understood with reference to theaccompanying drawings, wherein:

FIG. 1 is a perspective view of a sleeping bag according to the presentinvention;

FIG. 2 is a cross-sectional view of the sleeping bag taken along lineII-II in FIG. 1;

FIG. 3 is a cross-sectional view similar to FIG. 2 and shows a bottomportion and a nonbottom portion of the sleeping bag;

FIG. 4 is a perspective view of an air bag;

FIG. 5 is a cross-sectional view similar to FIG. 2 and shows an air bagfiller; and

FIG. 6 is a perspective view of a sleeping bag having connected airbags.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 1 and 2, a sleeping bag 10 includes a shell 12defining an enclosed heat insulation space 14, a sleeping bag filler 16that is provided inside the heat insulation space 14, and one or moreair bags 18 that are provided inside the heat insulation space 14.

Referring to FIG. 3, the heat insulation space 14 includes a bottomportion 22 and a non-bottom portion 24. The bottom portion 22 is adaptedto support the weight of a user of the sleeping bag 10. The bottomportion 22 is the portion that the weight of a user of the sleeping bag10 presses the sleeping bag filler 16. The air bags 18 are positioned inthe bottom portion 22. The air bags 18 resist the pressure applied bythe weight of a user so that the sleeping bag filler 16 filling thebottom portion is not compressed. A zipper 32 is provided in thenonbottom portion 24 to facilitate use and storage of the sleeping bag10.

FIG. 4 shows that the air bag 18 includes a sealed air space 20 thatcontains air. The air bag 18 includes an elongated air tube 24. The airbag 18 includes an air communication conduit 30, and an air plug 31 thatplugs the air communication conduit 30.

Referring bag to FIG. 1, the sleeping bag 10 includes a pump 28 thatinflates the air bags.

Referring back to FIG. 2, the air bags 18 are spaced from one another bya predetermined interval a. The sleeping bag filler 16 fills the heatinsulation space 14 between the air bags 18.

The sleeping bag filler 16 is made of synthetic fiber, down, cotton orwool.

FIG. 5 shows another aspect of the present invention. In this aspect,each of the air bags 18 further includes an air bag filler 34 that isprovided in the sealed air space 20. The air bag filler 34 is made ofsynthetic fiber, down, cotton or wool.

FIG. 6 shows still another aspect of the invention. In this aspect, asleeping bag 36 includes a plurality of air bags 38 that are connectedwith one another so that the air bags 38 form a single sealed air space40 that contains air. The sleeping bag 36 is shown without the sleepingbag filler 16 for ease of illustration.

The air in the air bags 38 is communicated through connecting pipes 42that connect the air bags 38. Only one air communication conduit 30 andonly one air plug 31 is required for the entire air bags 38.

Although the present invention has been described in considerable detailwith regard to the preferred versions thereof, other versions arepossible. Therefore, the appended claims should not be limited to thedescriptions of the preferred versions contained herein.

1. A sleeping bag comprising: a) a shell comprising an enclosed heatinsulation space; b) a sleeping bag filler that is provided inside theheat insulation space; c) one or more air bags that are provided insidethe heat insulation space; wherein each of the air bags comprises asealed air space that contains air.
 2. The sleeping bag of claim 1,wherein the heat insulation space comprises a bottom portion and anon-bottom portion, wherein the bottom portion is adapted to support theweight of a user of the sleeping bag, wherein the air bags arepositioned in the bottom portion.
 3. The sleeping bag of claim 2,wherein each of the air bags comprises an elongated air tube.
 4. Thesleeping bag of claim 3, further comprising a pump, wherein the pumpinflates the air bags.
 5. The sleeping bag of claim 3, wherein each ofthe air bags comprises an air communication conduit, and an air plugthat plugs the air communication conduit.
 6. The sleeping bag of claim1, wherein the air bags are spaced from one another by a predeterminedinterval, wherein the sleeping bag filler fills the heat insulationspace between the air bags.
 7. The sleeping bag of claim 1, wherein thesleeping bag filler is made of synthetic fiber, down, cotton or wool. 8.The sleeping bag of claim 1, wherein each of the air bags furthercomprises an air bag filler that is provided in the sealed air space. 9.The sleeping bag of claim 8, wherein the air bag filler is made ofsynthetic fiber, down, cotton or wool.
 10. A sleeping bag comprising: a)a shell comprising an enclosed heat insulation space; b) a sleeping bagfiller that is provided inside the heat insulation space; c) one or moreair bags that are provided inside the heat insulation space; wherein theair bags are connected whereby the air bags forms a single sealed airspace that contains air.
 11. The sleeping bag of claim 10, wherein theheat insulation space comprises a bottom portion and a non-bottomportion, wherein the bottom portion is adapted to support the weight ofa user of the sleeping bag, wherein the air bags are positioned in thebottom portion.
 12. The sleeping bag of claim 10, wherein each of theair bags comprises an elongated air tube.
 13. The sleeping bag of claim10, further comprising a pump, wherein the pump inflates the air bags.14. The sleeping bag of claim 10, wherein the air space comprises an aircommunication conduit, and an air plug that plugs the air communicationconduit.
 15. The sleeping bag of claim 10, wherein the air bags arespaced from one another by a predetermined interval, wherein thesleeping bag filler fills the heat insulation space between the airbags.
 16. The sleeping bag of claim 10, wherein each of the air bagsfurther comprises an air bag filler that is provided in the sealed airspace.